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垂直分条采矿工艺在急倾斜薄矿体顶柱回收中的应用
- 贾志伟|李赫|章邦琼|魏鹏
- 作者单位：
- 中金黄金股份有限公司|内蒙古金陶股份有限公司|内蒙古金陶股份有限公司|内蒙古金陶股份有限公司
基金项目：
- 国家重点研发计划项目（2022YFC2905003，2022YFC2905004）
详细信息：
- 作者简介：
- 贾志伟（1965—），男，高级工程师，从事黄金矿山采矿与安全管理工作；E-mail:403888915@qq.com
- 通讯作者：
- 李赫（1976—），男，高级工程师，从事采矿工艺运用及生产管理工作；E-mail:930921759@qq.com
- PDF下载
Application of vertical strip mining process in the recovery of crown pillars in steeply inclined thin ore bodies
- English Author：
- ZhongJin Gold Corporation Limited|Inner Mongolia Jintao Co.,Ltd.|Inner Mongolia Jintao Co.,Ltd.|Inner Mongolia Jintao Co.,Ltd.
- Unit：
- 摘要
- 在线预览
- 参考文献
摘要:
急倾斜薄矿体在空场采矿法开采后会残留顶柱，由于透采时凿岩工人在逐渐变薄的顶柱下作业，安全风险较高，为避免出现大面积冒顶事故，常留设永久损失的高品位原生矿柱，造成了资源的极大浪费。为安全高效回收顶柱，提出一种垂直分条采矿工艺，详细介绍了该方法的采准切割布置、回采工艺及主要技术经济指标等。现场工业应用表明：采用该方法能够最大限度地回收顶柱，且空顶后暴露面积小，安全性高；台效由原工艺的15.4 t/台班提高至23.3 t/台班，提高了51.3 %；采矿损失率由62 %降低至5.3 %，相比原采矿工艺降低了91.5 %，取得了良好的技术经济效果，可在同类型矿山推广。
关键词:
高品位；冒顶；顶柱回采；垂直分条；急倾斜薄矿体；削壁充填采矿法
Abstract:
In steeply inclined thin ore bodies,crown pillars left behind after open stoping present significant safety risks during extraction,as drilling workers operate under increasingly thin pillars,leading to a high likelihood of large-area roof collapses.To avoid these risks,high-grade primary ore pillars are often permanently left in place,resulting in significant resource wastage.To safely and efficiently recover these crown pillars,a vertical strip mining process is proposed.This paper provides a detailed explanation of the method’s cutting layout for preliminary mining,recovery process,and key technical and economic indicators.Industrial application on-site has shown that this method maximizes the recovery of crown pillars while minimizing the exposed area after roof removal,thereby ensuring high safety.The per-shift for unit machine productivity increased from 15.4 t to 23.3 t,an improvement of 51.3 %.The mining loss rate decreased from 62 % to 5.3 %,a reduction of 91.5 % compared to the original mining method,yielding excellent technical and economic results.This process can be promoted in similar mines.
Keywords:
high-grade ore;roof collapse;crown pillar recovery;vertical strip;steeply inclined thin ore body;resuing and filling mining
